Anyone know the Tow Hook size? Is it an M18 bolt/nut?

[exe36m3]

Gentlemen - I am doing a bit of a vanity project using the Supra tow hook location.
(Two strap, GoPro mount, etc.) Is the female socket made on the Supra (Z4) sized for an M18 bolt?

Thank you!
Percy

UPDATE - Update, I grabbed a towhook from my son's 2015 435i (F32), it fits the Supra. So A LOT more tow hook choices now.

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[haoblake]

Chatgpt said 7/16-20 x 1.5" hex bolt